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On Wed, Sep 16, 2009 at 1:36 PM, Robby Findler <robby@xxxxxxxxxxxxxxxxxxxxx> wrote: > I'm not sure if this is what's being asked, but I too think of > "immutable" as "cannot change" (which is in line with the English > meaning of the word). > > Robby I'll third or fourth that motion. "immutable" carries a very different semantic that will lead to nothing but confusion if used in the way being proposed in this SRFI. RScheme's object system has a concept of immutable slots exactly for the reason someone mentioned earlier -- it's advise to the compiler that the value will not change, and hence the value can be cached and it's known that calls through an unknown function will not change it either. (IIRC, this idea was taken directly from Dylan) -- -- Donovan